/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: Lenovo
 * Date: 2024-09-13
 * Time: 10:17
 */
public class and {
    public static void main(String[] args) {

        int n = 1;
        int result = 0;
        while (n <= 100) {
            result += n;
            n++;
        }
        System.out.println(result);
    }
}
